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"Didn't you ask me to help purchase a UPS uninterruptible power supply in the afternoon?" Forgetting to see that Huang Shi had already begun to listen to him carefully, he thought for a while and started from the beginning.

"yes, what's wrong?" Huangshi wants to buy a few UPS for temporary use before the diesel generator and wind turbine are installed, and the initial idea is to use it as an output power supply on Dongluo Island after the shipyard is charged.

"Then the working environment you are asking for only needs to be in reserve." Because the advantages of the backup UPS power supply are that the operation efficiency is high, the noise is low, and the price is relatively cheap, which is mainly suitable for occasions where the mains power fluctuates little and the power supply quality is not high.

"Yes, that's right, there's a problem." Because Huangshi was also engaged in technical work, he also has an understanding of the working principle of UPS, which is divided into three categories: backup, online and online interactive.

Among them, the most commonly used in people's work and life is the first kind, that is, the backup UPS, which has the most basic and important functions of UPS such as automatic voltage stabilization and power-off protection, although there is generally a conversion time of about 10ms, but because of the simple structure and has the advantages of low price and high reliability, it is widely used in microcomputers, peripherals, POS machines and other fields.

The backup UPS power supply is divided into two modes: the backup sine wave output UPS power supply and the backup square wave output UPS power supply.

Among them, the backup sine wave output UPS power supply, the output of a single machine can be 0. 25KW~2KW, when the mains power changes between 170V~264V, the user is provided with the mains power processed by the voltage regulator; When the mains power exceeds the range of 170V~264V, the UPS will provide high-quality sine wave power supply.

The other kind of backup square wave output UPS power supply, which is different from the backup sine wave output UPS power supply, only provides users with 50Hz square wave power supply.

The structure of the second kind of online UPS is more complex, but the performance is perfect, and it can solve all power supply problems, such as the four-way PS series, which is characterized by the ability to continuously output pure sine wave alternating current with zero interruption, and can solve all the power supply problems such as spikes, surges, and frequency drifts; Due to the large investment required, it is often used in power-demanding environments such as critical equipment and network centers.

The last kind of online interactive UPS, compared with the backup type, the online interactive type has a filtering function, the ability to resist mains interference is very strong, the conversion time is less than 4ms, and the inverter output is an analog sine wave, so it can be equipped with network equipment such as servers and routers, or used in areas with harsh power environments.

The electrical equipment on Dongluo Island is a few computers, and even the servers are not equipped now, and the rice cookers, refrigerators, etc. in the kitchen, of course, Huangshi will not have the luxury to use these uninterruptible power supplies to drive them, so as long as there are a few backup UPSs to rotate, and then pull the discharged UPS back to the shipyard to charge it again.

"Tut, of course there is a problem, the backup UPS can only support a few minutes at most, generally 1000VA can carry 600W load, this UPS is about 400~500 yuan, 500VA with 300W load, this UPS is about 100~200 yuan."

"We now generally have a desktop computer power of 200~300W, while the power of a laptop is slightly smaller, about 150W."

"yes, I know that." Huang Shi nodded, indicating that he understood these things, but he didn't know what he wanted to say.

"But if you want 6 laptops to be able to use for 12 hours after the power goes out, then you can calculate how much VA it will take." Speaking of this, I almost pointed at Huang Shi's nose and scolded, you are also engaged in technical skills, how could you make such an outrageous request.

"Of course I don't ask you to have a UPS to support it for so long, I also wrote on that list, you can also consider 3 or 4 UPS for me." Huang Shi was strange and forgot why he was so angry, he obviously made a special note on the list.

"Yes, is it written?"

"Of course it's written, otherwise you take out the list, and we'll take a look at it again." Huang Shi was a little helpless, but he did remember what he had written.

Waiting for the forgetfulness to take out the list, the two of them followed the list to look down, and when they saw the requirement that UPS can support for 12 hours, they had not found the one that Huangshi said, and Huangshi saw that he was about to shout again, so he preemptively said, "Xiaodan, let's finish reading the content and then talk." ”

Sure enough, in the last line at the bottom of this list, Huangshi wrote on it that if a UPS cannot meet the above requirements, then it can be increased to 3 to 4 UPSs to achieve this function.

"Damn, how could I notice that your request is written so underneath, and the handwriting is still so sloppy." He didn't know that Huangshi was almost afternoon because he saw the time, and he was afraid that he would come to disturb him after arriving in Zhuzhou, so he took out a small notebook in the car and wrote down some things that needed to be sent to purchase.

"I'm sorry, what was written in the car, where you want to write it, you can just read it." Huang Shi thought to himself that although he had his own reasons, he was still too impetuous to forget this person, and he didn't even finish reading it, so he shouted blindly.

"Alright, alright, I'll take a good look at it."

After reading it carefully, he said again, "Lao Huang, don't blame me for talking too much." ”

"No, just say anything you want."

"Then I'll just say it, you're a bit of money, and you want to burn money."

"Huh." Huang Shi laughed when he heard this, and did not respond to the words of the forgetfulness, because he knew what the Dao forgot to say, but the reality on the island was like this, and the wind turbine did not know when the wind turbine would be installed in place, and the diesel engine would be a few days away.

Sure enough, just as Huang Shi expected, forgetting that he didn't know about the situation, he was anxious about what his friends were anxious about, and he thought about what his friends thought, so he persuaded Huang Shi Dao, "Old Huang, even if you can do this, it's too painful." ”

Seeing that Huang Shi didn't say anything, he had no choice but to say to Lu Xia by himself, "Then you can only add a battery pack, one is not enough to add two, and two is not enough to add three." ”

"Hmm." Huang Shi nodded, he thought so himself.

"According to what we just said, then you need at least 6 to 8 battery packs to ensure that a laptop can be used for 4 hours." "Then you have to buy at least 40 batteries for 6 computers, and if it's 12 hours, then you need 120 batteries." ”

"Well, yes, no problem." Yellowstone nodded.

"Ugh." Seeing that Huang Shi was still so calm when he heard this number, he couldn't help sighing, and really felt that the person sitting opposite was a local tyrant, "Actually, I've seen someone like you do it before." ”

Saying this, Huang Shi became interested and asked, "What kind of person?" ”

"People are local taxes, and they use 40 dry batteries to ensure that 6 computers can be used for more than 4 hours, but they are a public unit."

The meaning of the words made Huang Shi feel as if he was despising himself, and he almost patted his chest and said, Lao Tzu, I am not bad for money, but I thought about it and endured it, I said this, didn't it prove that I was a nouveau riche, forget it, I still don't get angry with these idle, so I replied, "By the way, then you recommend the nose." ”

Because these UPSs are divided into two parts, the head and the battery, the battery is used as a backup energy to the load when the normal power supply fails, and there is no uninterruptible power supply without the battery. The machine head is the host part of the UPS, which is the key device, and the rectification, inverter, charging, and switching are all in it.

"Okay, I'll think about it." I forgot to see that Huang Shitie was determined to do this, so he had to follow him, so he was thinking about what brand was suitable for the local tyrant opposite.

"I originally wanted to say that Shante's UPS power supply is better, the price is low, the quality is good, and the after-sales service is good, but you are rich, so buy that Emerson's, or Easter, their quality is also better than Shante's, more durable, hehe."

"Okay, no problem, I'll buy Easter." Huang Shi vaguely remembers that most of these UPS brands are foreign brands, but they are generally produced in China, such as Yishi and Shante, and only Emerson does not seem to have set up factories in China, so he can support domestic products.

"Yes, but what about the other requirements?"

"Battery, what do you recommend?" Now UPS generally uses fully sealed maintenance-free lead-acid batteries as energy storage devices, batteries are an important part of UPS, accounting for a large proportion of value, and its quality is directly related to the normal use of UPS, so Huangshi should naturally carefully choose genuine batteries with quality assurance.

"The main brands of batteries are Yuasa, Panasonic, Hercules, Sunshine, Haizhi and other brands, I recommend you to use Panasonic."

"Panasonic?! Forget it, let's use the sun. Huang Shi could only give up when he heard Matsushita's name, because although he was not an angry young man, and he also admired the god of management, Konosuke Matsushita, and was also impressed by the Sakai method that advertised them back then, but now that China and Japan are in confrontation, if they buy one less Japanese electrical appliance, the funds for the revival of Japanese militarism will be several thousand, isn't it.

"Okay, no problem, when do you want it?" I don't know why I will choose Sunshine for Huangshi, but since he has already chosen, he can help buy it.

"When, I'll want it tomorrow morning."

"Ahh